The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 26, 1991
Filed:
Jun. 14, 1989
Atsushi Hattori, Nagaokakyo, JP;
Mabito Hanajima, Amagasaki, JP;
Masaharu Moriyasu, Amagasaki, JP;
Toshikazu Iwamoto, Nagaokakyo, JP;
Kazuhiko Matsumoto, Nagaokakyo, JP;
Mitsubishi Denki Kabushiki Kaisha, Tokyo, JP;
Abstract
A laminated shadow mask assembly for use in a color picture tube including an evacuated envelope having a longitudinal axis and also having a phosphor deposited screen lying generally perpendicular to the longitudinal axis, which assembly comprises a finely perforated, laminated shadow mask having a plurality of apertures defined therein in a predetermined pattern; a support frame for the support of the laminated shadow mask; and expansion compensating couplings disposed around the support frame for connecting the support frame in position within the evacuated envelope with the laminated shadow mask held generally parallel to the phosphor deposited screen. The finely perforated, laminated shadow mask comprises at least two perforated metal sheets each having a perforated area having minute holes defined therein and also having a non-perforated area, which minute holes in both of the perforated metal sheets form the apertures in the finely perforated, laminated shadow mask when the perforated metal sheets are connected together by means of a plurality of weld deposits formed within the perforated areas thereof to connect the perforated metal sheets firmly together.